Further info: I replicated this issue with gsoap versions 2.8.67 and 2.8.68 with the following build configs: Fedora 28 / gcc 8.1.1 (64-bit) Redhat 6.3 / gcc 4.4.6 (64-bit) Redhat 6.3 / Intel icc 13.1.2 (32-bit)
Memory leak with DEBUG turned on